A Line distrupting in front of my Donut model
I've made the donut before! This problem was mentioned in the videos somewhere, either in the same episode or the follow up episode. It is caused by an extra accidental layer of icing when extruding the region by extruding twice, the layer is probably meshed with your icing, so at this point the only thing you can do is delete the icing, and make a new one :D.